3(b-7)=-30

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Solution for 3(b-7)=-30 equation: 



3(b-7)=-30

We move all terms to the left:

3(b-7)-(-30)=0

We add all the numbers together, and all the variables

3(b-7)+30=0

We multiply parentheses

3b-21+30=0

We add all the numbers together, and all the variables

3b+9=0

We move all terms containing b to the left, all other terms to the right

3b=-9

b=-9/3

b=-3

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